a) Prove that. \( \begin{vmatrix} a & b & ax+by \\ b & c & bx+cy \\ ax+by & bx+cy & 0 \end{vmatrix} \) = \( (b^2 - ac)(ax^2 + 2bxy + cy^2) \) (b)…
Class 12 Business Mathematics · 2081 · Solved Question with Answer
a) Prove that.
\( \begin{vmatrix} a & b & ax+by \\ b & c & bx+cy \\ ax+by & bx+cy & 0 \end{vmatrix} \) = \( (b^2 - ac)(ax^2 + 2bxy + cy^2) \)
(b) Ramesh sells 3 shares of A and buys 2 shares of B, thus increasing his cash by Rs. 300. Prakash sells 1 share of A and buys 3 shares of B, thus decreasing his cash by Rs. 300. Write the equations related to above context.